Welcome to Site Spy
Monitor website changes with ease
Site Spy is a browser extension for Chrome and Firefox that monitors websites for changes. It automatically checks pages on a schedule you set, detects content updates, and notifies you instantly.
What can you do with Site Spy?
- Track any website — Add pages to your watchlist and get notified when they change
- Monitor specific elements — Use the element inspector to pick exactly what to watch (prices, stock levels, headlines)
- Visual diffs — See exactly what changed with green (added) and red (removed) highlights
- Snapshot timeline — Browse every captured version and compare any two snapshots
- Get notified — Browser alerts, email reports, or Telegram messages when changes are detected
- Organize with tags — Color-coded labels to filter and group your watches
- Sync across devices — Sign in once, access all watches from any browser